Exercise 2

Question 11 :

Pigmentation of skin is due to

A). lymphocytes
B). monocytes
C). leucocytes
D). melanocytes
Answer : Option D

Question 12 :

Norepinephrine increases

A). respiration
B). urine production
C). saliva production
D). blood pressure
Answer : Option D

Question 13 :

Night blindness is cause by lack of which vitamin?

A). Vitamin A
B). Vitamin B
C). Vitamin C
D). Vitamin D
Answer : Option A

Question 14 :

Monocot root differs from dicot root in having

A). open vascular bundles
B). scattered vascular bundles
C). well developed pith
D). radially arranged vascular bundles
Answer : Option C

Question 15 :

Radioactivity is a phenomenon of the spontaneous emission of

A). protons (alpha particles)
B). electrons (beta particles)
C). gamma rays (short wave electromagnetic waves)
D). All of the above
Answer : Option D